Machine for operating upon stereotype plates



Jan. 11 1927. 1,614,290

vW. EVENSEN MACHINE Fox OPERATING UPON STEREOTYPE PLATES med Nav 25, 192s 5 sheets-smet 1 w ln E SF* v Y() 1 N I 2 N "r N l m i l: 1|

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Q. :l o0 1- I- o N m IN VEN TOR 1927. 1 614 29o Jan u w. EvENsEN MACHINE FOR-OPERATING UPON STEREOTYPE PLATES Filed MayI 25. 192s 5 sheetsfsneet z w "f" N N f u, o n N N o o o m O m l. o' N HHH mi.

f l o fl;- O (gli o z 2 nf' J b v o N 3 d v; f1 V Q r 1* INVENTOR BY v l fr. l l @M Jan, 11 1927. 1,614,290

w. EVENSEN MACHINE FOR OPERATING UPON STEREOTYP PLATES Filed May 25, 192s 5 sheetsshet l 1N VENTOR TT RNE Y 1,614 29o Jan. 11 1927. W. EVENSEN MACHINE FOR OPERATING UPON sTEREoTYPE PLATEs Filed May' 25, 192s 5 sheets-sheen 4 415 .4 ATToR EY Jan. A11 1927. 1,614,290

` IN VEN TOR ATTORNEY Patented Jan. l1, 1927.

UNITED STATES 1,614,290 PATENT OFFICE.

WILLIAM EVENSEN, OF CHICAGO, ILLI.T.\`I'0]IS, ASSIGNOR TO' GOSS RINTING PRESS COMPANY, A OORPORATON OF ILLINOIS.

MACHINE' FOR OPERATING Application filed May 25,

The invention relates to machines for shaving flat stereotype plates and more particularly to a novel machine having both improved plate handling or positioning. devices and plate shaving devices and cooperating parts.

Objects and advantages of the invention will be set' forth in part hereinafterand in part will be obvious lierefi'om, or may be learned by practice with the invention, the same being realized and attained by means of the instruinentalities and combinations pointed out in the appended claims.

The invention consists in the novel parts, constructions, arrang'en'ients, combinations and improvements herein shown and described'.

IThe accompanying drawings, referred to 'herein and constituting a part hereof, illustrate one embodiment of the invention, and together with the description, `serve to explain the principles of the invention.

Of the drawings:

Fig. l is a side elevation of a machine yconstructed in accordance with the invention; Y

Fig. 2 is a top plan of the machine shown in Fig. l;

FiO. 3 is a greatly enlarged vertical longitudinal section of the right-hand end of Fig. l showing the connections between the drive and the actuating means for the knife carrying mechanism` and is taken substantially on line 3-3 of Fig. 8;

Fig. l is a transverse vertical section taken substantially on 4the line la of Fig. 1; l Fig. 5 is a transverse vertical section, greatly enlarged, taken substantially on the linev55 of Fig. l, looking in the direction of the arrows;

Fig. 6 is a longitudinal vertical section .taken substantially on the line 6 6 ot' F 5 looking in the direction of the arrows.

Fig. 7 is a fragmentary vertical section taken on line 7-7 of Fig. 5; and

Fig. 8 is va diagran'imatic elevation of the driving connections between the motor and the knife carriage.

The-machine herein disclosed as the present preferred embodiment of the invention, comprises as its general features a stationary or fixed bed upon which the stereotype plate or plates to be shaved are supported face down and iii-proper position and a cooper ating shaving lcnife'earriage which is recipn UPON sTEREoTYPE PLATES.

1923. serial No. 641,305.v

vits movement along the bed and especially during the plate shaving operation.

The embodied form of this-carriage operating means comprises two screw-threaded rods connected directly and relatively rotatably to the back end of the carriage, and extending rearwardly longitudinally of and directly above the bed, suitably driven reversible screw-threaded gearing. being provid.d for1 actuating the screw rods.

T he plate-shaving knife is suspended freely in the carriage so as to have a desir able rocking motion longitudinally of the bed. Means are provided for raising and lowering the knife relatively to the carriage and therefore relatively to the bed, to regulate or determine the thickness of the finished plate; the movable knife, however', in all positions of work being firmly backed and supported by the rigid and absolutely positioned carriage. The knife is also preferably set with its cutting edO'e inclined transversely yof the bed so that the attack on the. plate during the shaving operation is gradual-and is effected somewhat. diagonally of the plate throughout its progress.

A stereotype plate positioning stop mechanism is mounted on the forward end of the bed and this stop is vertically adjustable or positionable relatively to the bed, and is preferably kept always at the same relative level with respect to the shaving knife on the carriage, the stop being of such height as just to permit the making of the deepest cut which may be desired. The vertical rais ing and lowering and'thcrefore positioning of the knife and'stop are effected by a single mechanism which maintains them in the consta-nt relation already described. The bed `stop has its rear or plate-engaging edge preferabl f disposed diagonally across the bed, and preferably in the opposite direction to that in which the .shaving knife is in l il clined. The stop and shaving` knife both ljreing beveled, the plate is presented to, and

isoperated on by, the knife in a different and more advantageous manner than if either were used alone.

@ther features of the invention will be primarily set forth in connection with the following detailed description; and it will be understood that the foregoing general description and the following detailed description both are illustrative and exemplary of the invention but are not restrictive thereof.

Referring` now to the embodiment of trie invention sh-own by way of example in the accompanying drawings, the bed l of the machine is preferably in fixed position upon the `general frame 2 which is fixed to or mounted on a pedestal or other support 3. This leed is preferably of general rectangular form and the stereotype plate or plates .r to be sl aved or trimmed are supported face downward upon the surface 4 of this table or bed. The side edges of the bed l are formed into yguideways 5 and 6 for the knife supporting carriage 7, which is reciprocable to and fro along the bed.

rllhe general Structure of the .shaving knife carriage includes guide portions 8 and 9, which are formed with recesses therein to lit the guideways 5 and (l accurately while being` freely reciprocable therealong. The body lO of the carriage extends upwardly from the foregoing, and vthe details the mounting),` of the shaving knife therewithin will be later desc ibed In the embodied form of actuating means for the carriage, there are preferably provided a plurality of actuating' and guiding members engaging;` directly with the rear of the carriage, at separated points transversely thereof, .so as to always k ep the carriage in exact transverse alinement with respect to the bed and to prevent any strain or displacement thereof. irs emliodied, on the rear vertical face 4of the carriage there are formed cylindri ally apertured bosses i8 and 1f) within which the forward ends of serew-threaded rods Q() and 21 are bolted. The screw rods 2O and 2l extend rearwardly along' and above and parallel with the surface Ll of the hed. Guards may be placed about the screw-shafts 20 and 2l, and for this purpose pipes Q5 and 26 are shown enclosing;- the screw shafts and having` their rig-res bolted to the bearings for the srrew rEhe power is thus applied directhY shafts. to the carriage at the rear thereof, and di rectly in line with its movement,r and within the two vguideways for the carriage. There therefore, no chance for any strain in the head to distort the cut, as the power is applied in line directly behind the carriage with the thrust entirely in the forward direction.

In the ed bodied form of actuating` means for the foregoing mechanism, 2gear wheels 23 and il are mounted free to rotate onV the screw shafts 2l) and 2i, respectively, these gear wieels beingl provided with spur gear teeth. Integral and conc .itric with the 7gear wheels Q3 and 2d, respectively, .are internally screw-threaded bushings 3i', which are screw threaded onto the screw shafts 2O and 21, respectively.

The sleeves 8l have smooth external cylindrical surfaces, and are rotatably mounted in pcd-estais or brackets 3 1, respectively whereby the gear wheels Q3 and 2t with thei correspondinel sleeves or bushines 3l may be rotated Vin either direction to correspoiuingly propel the knife bearing carriage forwardly or bacliwardly along the bed. rEhe rear wheels 223 and 2d are provided with thrust bearings in the ends of the respective pedestals or journal blocks The flat sides of the gears 23 and 24; bear against roller earings carried by the blocks and 37; the rollers of' the roller bearings are indicated at @n the opposite or front side of the gear wheels 23 and 24: they are provided with concentric sleeves 36 which loosely surround the respective screw shafts and which are journaled, respectively, in bearing blocks 37.

Referrin;` now to the embodied form of driving means fo the carriage-operating screw shafts, and their screw feeding ,gear wheels just described, a motor 4l-hl is shown mounted on a bracket d5, carried on the maV chine frame. On the motor shaft is a beltdriving pulley do, ov which runs a belt 1l?, the belt running` also over a driven pulley d8, find on a shaft 49. Mounted on shaft 9, to rotate therewith, is a double-action friction clutch 50, which may be of any suitable or convenient form. i

lgoosely mounted on shaft. at one side of the friction clutch and cooperating' therewith is a rear wheel 5l, Lil:c.visc, on the opposite side of the friction clutch -l, loosely mounted on shaft- Ll), is a gear wheel 32, also adapted to be driven by the clutcn Elli lvleshing,- with the gear wheel :5l is a rear wheel 5l, fixed on a shaft 55, which shaft is journaled a., 56 and on the machine Arame Gear wheel 5d meshes with both fear wheels Q3 and 2l, previously described, tical' wheel marshes with an idler gear r-fhr'el 5S), show'n in Fig'. S. The idler in turn meshes with a gear wheel (il, which is li l on shaft 55 already described.

,i he manner of operation of the hereinbefore rh-cribed mechanism is subs intiallv as follows u 'l'he motor llniay be regard "d as continuously running', and the shaft Li9 will rotate continuously therewith, the double acting clutch 5() rotating with its shaft 49. 1When thc clutch is in neutral position, the mech* anism just described will run idle. When lll the friction clutch 50 is brought into driving engagement with gear wheel 51, gear wheels 23 and 24 are driven through gear wheel l to advance the knife-bearing carriage, that is, to move it toward the left in ligs. 1 andQ.'

Considering theV clutch again in neutral position, if the clutch be brought into driving engagement-with the gear 52,l it will then through the idler 59 and gear wheels (il and 511 rotate wheels 23 and 24 in the opposite direction, and will move the knife bearing carriage baclmvardly or to the right in Figs. 1 and 2. `When the carriage is being ldriven forward, gear 52r will rotate idly on shaft 49 asv it is out of engagement with the friction clutch 50, and when the carriage is being driven backward, gear wheel 51, beingout of engagement with the crutch 50 will rotate idly on the shaft L19.

Referring new to the embodied means for mountingand positioning the shaving knife upon its carriage, a wedge shaped or beveled slide is mounted inthe main body of the carriage to slide horizontally and transversely thereof. For this purpose, it isA provided with a Tv head, having guiding projections 71 and 72 extending along the upper edges thereof. These guiding projections, respectively, run in horizontally disposed guideways 73 and 74 formed one in the'body of the carriage and the other' in the front plate75, which plate is fastened to the carriage in suitable manner, as by bolts 7G.

The sliding piece 70 is internally apertured to receive its actuatingy shaft 7'?, which shaft has a screw-threaded portion 7S engaging with an internally screwthreaded portion 79, formed Ywithin the member 70, This shaft 77 is-journaled at 80 and 81 in the sidewalls4 of the upwardly extending portion ofl the carriage. The shaft is shouldered at S3 to longitudinally position it inr its bearings in the carriage,Y

as shown 1n Fig. 5. A hand wheel 84 is fixed to the shaft on the outside of the. car-- riage with the hub 95' of the hand wheel bearing against the outer wall ofthe carriage structure.

At its opposite end, shaft 77 projects outwardly from the side of the crriage, and fixed thereon .is a bevel gear 86, the hub thereof likewise forming a bcaring surface against the carriage structure, to maintain the shaft 77 in longitudinal position. In sliding engagement with the transverselymovable wedge member 70, is a vertically slidable member 90. interlocking slidable connection between the two being effected by the hook-like members 91v and 92, as shown in Fig. G. rthe member 90 is vertically slidable between the solid back plate ofthe upwardly projecting part of thecarriage structure, andthe front plate already described. The side edges orends of the vertically slidable member 90 are in close slidable engagement with the surfaces 96 and 971er' thel side walls of the carriage, which also serve to guide the member 90 and pre-i vent any possible. cant or deflection thereof.

The shaving knifev 98 is preferably mounted upon' this positioning structure so as tofswing freely backwardly upon the return motion of' the carriage. the knife 9S is mounted on a carrying block 99,.which block is provided at either end thereof' with apertured supporting blocks or ears 105 and 106, which are lixcd to the block by screws 107 and 108. A shaft 109 passes loosely through the aperture in the blocks or ears 105 and 10G, the shaft being fat-tened to and supported by the sliding member 90 by suitable means such as screws 112.

Means are-provided for adjustably positioning the knife upon its holder or carrier block 99, and preferably to adjustit absolutely to a true position horizontally with reference thereto and thereby to the supporting bed Ll and the stereotype plate thereon. As embodied, there is provided at the bottom and at either side of the knife bearing block two forwardly extending supports-or blades 114 which are at a definite n-edetermined distance above thel support 4; The bottom edge of the knife. 98 rests upon. these supports.

A plurality of slots 115 are formed in the knife 98, and clamping screws 116 project loosely throughthese slots and are screwthreaded into the knife carrying block. 99, as best appears-from Fig. 6. f A plurality of positioning screws 117 are screw-threaded into lugs 118 projecting horizontally forwardly from the knife-carrying block 99, the tips of these screws bearing against the top of the knife. vThus the screws 117 will press the knife vfirmly home to its seat on the supports 114, and the clamping'screws 116 will hold the blade in position with its cutting redge horizontally true and parallel with the bed surface Il.

The mechanism just described operates substantially as follows:

fl the hand wheel Si.; be rotated in either direction, the wedge shaped member 7 0 will travel horizontally along shaft 77, sliding in'its guideway, either to the right or to the left in Fig. 5. Due to thevinterlocking of the member 70 with the member 90, as shown at 91 and 92, the member 90 will move either upwardly or downwardly in its guideways in the carriage,corresponding tothe horizent-al movement in either direction of the member 70, as just described. This will raise or lower' the shaving knife 98 with respect to the surface i of the bed, upon which surface the stereotype plate or plates to be shavedfrests. An indicator 87 is pivoted at [is embodied,

89 to the casing and is actuated by a pin 83 carrie l by member 90, which pin is movable in a slot 88L en an arm 87" rigid with the indicator 87. rl`his will cause the indicator hand to move along the scale 89a and enable the operator to accurately regulate the thickness of the shaved plate.

As the carriage travels forwardly, as during the shaving of the plate or plates, when the knife 98 engages the work, the block 99 is pressed backwardly about its pivotal bearing on the shaft 169 and the back surface 124 of the knife-bearing block bears directly and firmly against the fiat and solid surface of the carriage. rlhus there can be no give or yield as the machine operates, as in this position the knife is as though it were integral with the carriage. Villen the carriage is traveling backwardly the knife is free to swing or rock forwardly, that is to the left in 6, should it encounter any obstruction.

1n accordance with one feature of the invention, a stop for holding or positioning the stereotype plate or plates to loe shaved is provided, which is shaped or positioned to present said plate or plates diagonally with respect to the shaving knife and preferably also with respect to the bed 1.

1t is also usually preferable that the positioning surface or side of the stop shall be inclined reversely to the direction of inclination ofthe shaving knife, as shown in Fig. 1.

According to one feature of the invention, this positioning stop mechanism for the stereotype plate to be operated on moves upwardly and downwardly in permanent fixed relation with respect to the shaving` knife as the knife is moved toward or away from the bed, so that the stop is just clear of the cut of the knife as it finishes shaving the plate and passes over the stop. In the present embodiment, these two features of the invention are incorporated into the same mechanisn'i.

Accordingly, a block or stop support is mounted for to and fro vertical movement in a recess in the forward end of the machine bed, thel side edges 131 and 132 being in accurate slidablc engagement with the side walls of the aperture in the machine hed. to aline and guide the stop bearing blo-ck. ylhe block 136 extends upwardly above the surface of the bed 1, and the stop proper preferably a plate 134 reniovably fixed in the top of the block 13() and extending hori- Zontally rearwardly therefron'l, and having a beveled edge 135 against which the stereotype plate :n is positioned as it rests upon the surface 4 of the bed 1.

'lhe stop plate 134 is ren'im'ably but acci. 1ately held 1n position on its supporting block 13() as by a slidable dove-tail joint 129 as shown in Fig. l. `When a very large rei/1,290

stereotype plate is to be shaved there may not be room to place it diagonally, in which case stop plate 134 may be removed and the plate placed squarely against stop 130.

Referring now to the embodied form of means for raising and lowering the shaving knife and this work stop together, a shaft 146 is journaled in brackets 147 and 148, which extend outwardly from the side of the reciprocating carriage. A bevel gear 150 is fired on shaft 146, and is in mesh with the 1nevel gear 86 already described. At its opposite end, there is fixed to shaft 146 a bevel gear 151, which meshes with a bevel gear 153 so that they rotate together, the gear being` slidable along the shaft.

Shaft 153 is `iournaled in brackets 154 and 155, which are fixed to and extend outwardly from the side of the machinevframe. r1`he hub of gear wheel 152 is journaled in bracket 148 which causes it to slide along shaft 153 and to keep in mesh with the bevel gear 151 on shaft 146. Fixed to the forward end of shaft 153 is a bevel gear 156, which meshes with a bevel gear 157 which is fixed on a shaft 158. Shaft 158 is journaled in brackets 159 and 160 fastened to the machine frame.

Fixed on shaft 158 is a bevel gear 161 which meshes with a bevel gear 162 which latter is fast on a shaft 163. Shaft 163 is journaled in a lug 164, formed on the supporting pedestal 3. A collar 165 maintains the shaft in its position in its bearing. rlhe upper end of shaft- 163 is provided with a screw-thread 166 which is screwed into an internally screw-threaded aperture 167, formed in the stop carrying block 130. A hand wheel 168 is fixed to shaft 163.

A suitable automatic throw-oil' or stop motion is preferably provided which may be of any desired or convenient form. As shown, clutch 50 has an operating lever 170, which is pivoted at 171 on the frame. The lever at its outer end has a pivot connection 172 with a longitudinally slidable rod 173. A pivoted handle 174 slides rod 173 to throw in clutch 50 either way. Stop pins 175 and 176 are fixed to rod 17 3, and a lug 177 on the knife carriage engages therewith at either end of the carriage travel to autoimitically throw out the clutch.

'lhc drive for the knife carriage is directly behind the carriage, and acts thereon from directly behind at two well separated points, the drive itself being in positive alineinent in the direction of travel. of the carriage. The carriage has also rigid and ample guide ways upon the bed itself. Thereoy absolute rigidity and accuracy in the position and travel of the carriage is insured. The knife is mounted so that while it is free to swing for clearance it is always accurately in position as to thickness and is firmly and accua Bevel gear 152 is splined on a shaft rately backed directly against the rigid structure of the carriage during the shaving operation. The vertically adjusting mechanism for the shaving knife is backed and supported in the same manner.

The knife and stop mechanism are likewise kept in accurate and permanent relative position with respect to each other through all changes in the depth *of the cut, or thickness of the shaved plate, by means of the single mechanism for operating to simultaneously position both the knife and stop. The beveled stop also presents the work in the most advantageous way to the knife and increases the angularity between the work and thel knife whereby it is possible to shave avery small plate perfectly flat, and because the knife leaves the work so gradually it is further possible to lay a number of small plates one behind the other and to shave all of them successively. at one operation of the machine and secure a smooth, uniform and accurate cut in all the plates.

When the stop is placed at any angle and the knife is also placed at a small angle, there is very little side thrust, the cutting is in a straight line forward, and presses the work firmly against the stop. lVhere a very large plate. is to be shaved, the removable beveled portion of the stop may be removed by reason of the connection already described, and the full space up to the portion ofthe stop mechanism which works through the bed plate may be utilized and also with a large plate if placing the plate against the angled stop will prevent its passing within the opening at the bottom of the carriage between the guides, the straight part of the stop may be employed.

The invention in its broader aspects is not limited to the specific mechanisms shown and described but departures may be made therefrom within the scope of the accompanying claims without departing from the principles of the invention and without sacrificing its chief advantages.

lVhat I claim is zd l. A machine for shaving stereotype printing plates including in combination means for supporting and positioning a stereotype plate, a t"aveling knife carriage having a rigid wall, a shaving knife swingably mounted on the carriage, and adapted to press firmly against said rigid wall during the shaving operation and means for eecting relat ve reciprocatory movement between the stereotype plate and the shaving knife.

2. A machine for shaving stereotype printing plates including in combination means for supporting and positioning a stereotype plate, a traveling knife carriage having a rigid wall, a shaving knife hingedly mounted on the carriage, and adapted to press firmly against said rigid wall during the shaving operation, a plate stop movable simultaneously with the positioning of said knife, and means for effecting relative reciprocatory movement between the stereotype plate and the shaving knife.

A machine for shaving stereotype printing plates including in combination a support for a stereotype plate to be shaved, a shaving knife variably positionable relatively to the plate to regulate the amount of the cut and a stop for the plate movable simultaneously with the positioning of the knife.

4l. A machine for shaving stereotype printing plates including in combination a sup-.

port for a stereotypeV plate to be shaved, a shaving knife variably positionable relatively to the plate to regulate the amount of the cut, a stop for the plate movable simultaneously with the positioning of the knife and connections between the knife and .stop for maintaining them in the same relative position.

5. A machine for shaving stereotype printing'plates including in combination a stereotype plate supporting bed, a reciprocable carriage and a shaving knife mounted thereon, a stop for positioning the plate on the bed, the bed and knife being relatively movable for effecting cuts of different depths and means for maintaining the knife and stop in the same relative position.

(S. A machinev for shaving stereotype printing plates including in combination a stereotype plate supporting bed, a reciprocable carriage and ashaving knife mounted thereon, a stop for positioning the plate on the bed, the bed and knife being relatively movable for effecting cuts of different depths and means operating automatically to maintain the knife and stop in the same relative position.

7. A machine for shaving stereotype printing plates including in combination a fixed stereotype plate supporting bed with guideways formed thereon, a reciprocable carriage traveling on the guideways and a shaving. knife mounted thereon, a stop for positioning the plate on the bed, the bedk and knife being relatively movable for effecting cuts of different depths and means for maintaining the knife and stop in the same relative position.

8. A machine for shaving stereotype printing plates including in combination a fixed stereotype plate supporting bed with guideways formed thereon, a reciprocable carriage traveling on the guideways and a shaving knife mounted thereon, a stop for positioning the plate on the bed, the bed and knife being relatively movable for effecting cuts of different depths and means operating automatically to maintain the knife and stop in the same relative position.

9. A machine for shaving stereotype printing plates including in combination a stereolll) type plate supporting bed and a knife cai'- riage relatively movable With respect to each other, and an oblique stop on the bed for presenting a stereotype plate obliquely to the knife on the carriage to be shaved thereby.

1t). A machine for shaving stereotype printing plates including` in combination a stereotype plaie supporting bed and a knife carriage relatively movable with respect to each other, a knife on the carriage with its cutting edge set obliquely to the direction of said movcn'ient, and an oblique stop on the bed for presenting a stereotype plate obliquely to the knife on the carriage to be shaved thereby.

l. A machine for shaving stereotype printing plates including in combination a stereotype plate supporting bed, a knifeV carriage, and a plate stop adapted to present a plate to the knife either squarely or obliquely to the knife.

12. A machine for slnivingstereotype printing plates including in combination a stereotype plate supporting bed, a knife carriage, and a. plate stop having detachable parts and thereby adapted to present a plate to the knife either squarely or obliquely to the knife.

13. A machine for shaving stereotype printing` plates including in combination a plate supporting bed, a carriage, and a mounting thereon for the knife, means for relatively variably positioning the knife mounting and carriage t0 effect shaving cuts 0f diHerent depths, and knife blade abutment stop means for positively positioning the knife on its mounting.

14. A machine for shaving stereotype printing plates, including in combination a shaving knife, a mounting block for the shaving knife, knife edge abutment means carried by the mounting block for determining the accurate placement of the shaving knife thereon, and means for clamping the knife to the block.

15. A machine for shaving stereotype printing plates, including in combination a shaving knife, a mounting block for the shaving knife, means carried by the mounting block and engageable with the edge ofv the knife, for determining the accurate placement of the shaving knife thereon, and means for clamping the knife to the block.

16. A machine for shaving stereotype printing plates, including in combination a shaving knife, a mounting block for the shaving knife, a pair of supports carried at the ends of the mounting block and engageable under the knife near each end thereof, for determining the accurate placement of the shaving knife on the mounting block, and means -for clamping the knife to the block.

17. A machine for shaving stereotype printing plates, including in combination a shaving knife, a mounting block therefor, a support carried by the mounting block against which the knife is adapted to seat for determining the accurate placement thereof, means for pressing the knife against said support, and means for clamping the knife to the mounting block.

18. A machine for shaving stereotype printing` plates, including in combination a stereotype. plate, supporting bed, a traveling knife carriage, means for reciprocating the knife carriage over the plate supporting bed, knife supporting means having an inclined bearing surface, and a transversely movable Wedge member engag-eable with said inclined bearing surface porting means.

19. A machine for shaving stereotype printing plates, including in combination a stereotype plate supporting bed, a traveling knife carriage, means for reciprocating the knife carriage over the plate supporting bed, knife supporting means vertically movable in the knife carriage, and a transversely movable Wedge directly above the knife supporting means and engageable therewith for causing it to rise'and fall for adjusting the position of the cutting knife.

20. A machine for shaving stereotype printing plates, including in combination a stereotype plate supporting bed, a traveling knife carriage, means for reciprocating the knife carriage over the plate supporting bed, and means for vertically adjusting the knife, comprising tivo members having obliquely disposed, L-shaped, interengaged elements, and means for moving one of said members transversely.

In testimony whereof, have signed my 105 name to this specification.

l/VlLLIAM EVESEN.

for moving the knife sup-` 

